EXHIBIT 31.1

                                 CERTIFICATIONS

I, W. Brent LaGere, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Chandler (U.S.A.),
   Inc.;

2. Based on my knowledge, this report does not contain any untrue statement
   of a material fact or omit to state a material fact necessary to make the
   statements made, in light of the circumstances under which such statements
   were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial
   information included in this report, fairly present in all material respects
   the financial condition, results of operations and cash flows of the
   registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for
   establishing and maintaining disclosure controls and procedures (as defined
   in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over
   financial reporting (as defined in Exchange Act Rules 13a-15(f) and
   15d-15(f)) for the registrant and have:

     a)  Designed such disclosure controls and procedures, or caused such
     disclosure controls and procedures to be designed under our supervision,
     to ensure that material information relating to the registrant, including
     its consolidated subsidiaries, is made known to us by others within those
     entities, particularly during the period in which this report is being
     prepared;

     b)  Designed such internal control over financial reporting, or caused
     such internal control over financial reporting to be designed under our
     supervision, to provide reasonable assurance regarding the reliability
     of financial reporting and the preparation of financial statements for
     external purposes in accordance with generally accepted accounting
     principles;

     c)  Evaluated the effectiveness of the registrant's disclosure controls
     and procedures and presented in this report our conclusions about the
     effectiveness of the disclosure controls and procedures, as of the end
     of the period covered by this report based on such evaluation; and

     d)  Disclosed in this report any change in the registrant's internal
     control over financial reporting that occurred during the registrant's
     most recent fiscal quarter (the registrant's fourth fiscal quarter in
     the case of an annual report) that has materially affected, or is
     reasonably likely to materially affect, the registrant's internal
     control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on
   our most recent evaluation of internal control over financial reporting, to
   the registrant's auditors and the audit committee of registrant's board of
   directors (or persons performing the equivalent functions):

     a)  All significant deficiencies and material weaknesses in the design or
     operation of internal control over financial reporting which are
     reasonably likely to adversely affect the registrant's ability to record,
     process, summarize and report financial information; and

     b)  Any fraud, whether or not material, that involves management or other
     employees who have a significant role in the registrant's internal control
     over financial reporting.


Date:  August 10, 2010


                                          /s/ W. Brent LaGere
                                          -------------------------------------
                                          W. Brent LaGere
                                          Chairman of the Board and
                                          Chief Executive Officer

<PAGE>

                                                                  EXHIBIT 31.1
                                                                  (CONTINUED)

                                 CERTIFICATIONS

I, Mark C. Hart, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Chandler (U.S.A.),
   Inc.;

2. Based on my knowledge, this report does not contain any untrue statement
   of a material fact or omit to state a material fact necessary to make the
   statements made, in light of the circumstances under which such statements
   were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial
   information included in this report, fairly present in all material respects
   the financial condition, results of operations and cash flows of the
   registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for
   establishing and maintaining disclosure controls and procedures (as defined
   in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over
   financial reporting (as defined in Exchange Act Rules 13a-15(f) and
   15d-15(f)) for the registrant and have:

     a)  Designed such disclosure controls and procedures, or caused such
     disclosure controls and procedures to be designed under our supervision,
     to ensure that material information relating to the registrant, including
     its consolidated subsidiaries, is made known to us by others within those
     entities, particularly during the period in which this report is being
     prepared;

     b)  Designed such internal control over financial reporting, or caused
     such internal control over financial reporting to be designed under our
     supervision, to provide reasonable assurance regarding the reliability
     of financial reporting and the preparation of financial statements for
     external purposes in accordance with generally accepted accounting
     principles;

     c)  Evaluated the effectiveness of the registrant's disclosure controls
     and procedures and presented in this report our conclusions about the
     effectiveness of the disclosure controls and procedures, as of the end
     of the period covered by this report based on such evaluation; and

     d)  Disclosed in this report any change in the registrant's internal
     control over financial reporting that occurred during the registrant's
     most recent fiscal quarter (the registrant's fourth fiscal quarter in
     the case of an annual report) that has materially affected, or is
     reasonably likely to materially affect, the registrant's internal
     control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based
   on our most recent evaluation of internal control over financial reporting,
   to the registrant's auditors and the audit committee of registrant's board
   of directors (or persons performing the equivalent functions):

     a)  All significant deficiencies and material weaknesses in the design or
     operation of internal control over financial reporting which are
     reasonably likely to adversely affect the registrant's ability to record,
     process, summarize and report financial information; and

     b)  Any fraud, whether or not material, that involves management or other
     employees who have a significant role in the registrant's internal
     control over financial reporting.


Date:  August 10, 2010


                                          /s/ Mark C. Hart
                                          ------------------------------------
                                          Mark C. Hart
                                          Senior Vice President - Finance,
                                          Chief Financial Officer
                                          and Treasurer